191025613 has 2 divisors, whose sum is σ = 191025614. Its totient is φ = 191025612.

The previous prime is 191025607. The next prime is 191025619. The reversal of 191025613 is 316520191.

It is a balanced prime because it is at equal distance from previous prime (191025607) and next prime (191025619).

It can be written as a sum of positive squares in only one way, i.e., 122168809 + 68856804 = 11053^2 + 8298^2 .

It is a cyclic number.

It is not a de Polignac number, because 191025613 - 2¹⁷ = 190894541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191025619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95512806 + 95512807.

It is an arithmetic number, because the mean of its divisors is an integer number (95512807).

Almost surely, 2^191025613 is an apocalyptic number.

It is an amenable number.

191025613 is a deficient number, since it is larger than the sum of its proper divisors (1).

191025613 is an equidigital number, since it uses as much as digits as its factorization.

191025613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 191025613 is about 13821.2015758399. The cubic root of 191025613 is about 575.9222633727.

The spelling of 191025613 in words is "one hundred ninety-one million, twenty-five thousand, six hundred thirteen".